How do I align input field and submit button (also differences between: IE, FFox, Chrome)?

Here is what works for me in FF, IE8 and Chrome on XP

#subscribe_email {
    border: solid 1px #CCC;
    height: 21px;
    width: 250px;
    font-size: 15px;
    color: #999;
    padding-left: 5px;
    vertical-align: bottom
}

#subscribe_submit {
    border: solid 1px #CCC;
    height: 25px;
    width: 115px;
    color: white;
}

I removed CSS on the #form_box div, set vertical-align:bottom and tweaked the height on text box.